𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Visible cathodoluminescence from carbon nanotubes: the role of impurities

✍ Scribed by Barberio, M. ;Barone, P. ;Bonanno, A. ;Camarca, M. ;Oliva, A. ;Pingitore, V. ;Xu, F.

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
336 KB
Volume
205
Category
Article
ISSN
0031-8965

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Luminescence spectra obtained by electron bombardment (cathodoluminescence, CL) on bundles of pristine single walled (SWCNT) and multi walled carbon nanotubes (MWCNT) show several common peaks at 1.76, 1.94, 2.06, and 2.22 eV which disappear after heating the samples up to 1300 K. We show that these transitions are extrinsic to nanotubes and originate from nickel oxide impurities, residual catalyst material used in the growth processes. Our conclusions are confirmed by X‐ray photoelectron spectroscopy (XPS) and energy dispersed X‐ray analysis measurements. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

📜 SIMILAR VOLUMES

Removal of some impurities from carbon n
Removal of some impurities from carbon nanotubes
✍ Yongcheng Feng; Gumin Zhou; Guoping Wang; Meizhen Qu; Zuolong Yu 📂 Article 📅 2003 🏛 Elsevier Science 🌐 English ⚖ 206 KB

A non-destructive mild oxidation method of removing some impurities from as-grown carbon nanotubes (CNTs), including single-wall carbon nanotubes (SWNTs) and multi-wall carbon nanotubes (MWNTs), by H 2 O 2 oxidation and HCl treatment, has been investigated, and somewhat pure carbon nanotubes have be